Hannigan's honeyed voice electrified Damien Rice's affecting 2002 album O, but it was when their professional and romantic relationship ended that her solo career began: the delicate, winsome Sea-Sew was Mecury-nominated in 2009. Her voice remains the main attraction on this second album but its prettiness often sounds thin against the sort of arrangements that invite the description "plinky-plonky". The fey "O Sleep", for example, will have you grinding your teeth rather than gently drifting off. Elsewhere though, there's a bit of metal to give that mellifluousness a kick: "Knots" has the sort of swing and stomp that would do PJ Harvey proud.